/*
 * Tencent is pleased to support the open source community by making Angel available.
 *
 * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in 
 * compliance with the License. You may obtain a copy of the License at
 *
 * https://opensource.org/licenses/Apache-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 *
 */


package com.tencent.angel.webapp.page;

import com.google.inject.Inject;
import com.google.protobuf.ServiceException;
import com.tencent.angel.exception.UnvalidIdStrException;
import com.tencent.angel.master.app.AMContext;
import com.tencent.angel.master.client.PSClient;
import com.tencent.angel.ps.PSAttemptId;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.yarn.webapp.view.HtmlBlock;

import java.io.IOException;

import static com.tencent.angel.webapp.AngelParams.PSATTEMPT_ID;
import static org.apache.hadoop.yarn.util.StringHelper.join;


public class ParameterServerThreadStackBlock extends HtmlBlock {
  final AMContext amContext;
  private static final Log LOG = LogFactory.getLog(ParameterServerThreadStackBlock.class);

  @Inject ParameterServerThreadStackBlock(AMContext amctx) {
    amContext = amctx;
    amContext.getParameterServerManager();
  }

  @Override protected void render(Block html) {
    set(TITLE, join("Angel ParameterServerThread ", $(PSATTEMPT_ID)));
    PSAttemptId psAttempttId = null;
    try {
      psAttempttId = new PSAttemptId($(PSATTEMPT_ID));
    } catch (UnvalidIdStrException e) {
      LOG.error("unvalid id string, ", e);
      return;
    }

    try {
      LOG.info("start init PSClient");
      PSClient psClient = new PSClient(amContext, psAttempttId);
      String info = psClient.getThreadStack();
      html.pre()._(info)._();
    } catch (IOException | ServiceException e) {
      LOG.error("get thread stack from ps " + psAttempttId + " failed. ", e);
    }
  }

}
